BisonCreative & development notes

Audio & video developmentHistorical technical note

Building FFmpeg-iOS on a Mac

Records preparing gas-preprocessor and yasm on a Mac, then running the FFmpeg-iOS build script. It explains script locations, dependency installation, and output directories to prepare libraries for the later decoding examples.

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I will not explain FFmpeg's uses in detail here. Interested readers can look them up.

Now for the main instructions:

  1. Download gas-preprocessor

  2. From gas-preprocessor, copy gas-preprocessor.pl into /usr/local/bin/.

  3. Enable permissions.

chmod 777 /usr/local/bin/gas-preprocessor.pl

4. Install yasm.

brew install yasm

After installation, the result looks like this:

==> Downloading https://homebrew.bintray.com/bottles/yasm-1.3.0.el_capitan.bottl
######################################################################## 100.0%
==> Pouring yasm-1.3.0.el_capitan.bottle.1.tar.gz
🍺  /usr/local/Cellar/yasm/1.3.0: 44 files, 3.1M

5. Download the Mac FFmpeg build script

6. In Terminal, use cd followed by the folder path to enter the downloaded folder, then run the build script.

./build-ffmpeg.sh

You can now take a drink and wait for compilation. If FFmpeg is not installed, this command installs it automatically, which may take a while. When all compilation completes, it produces the FFmpeg-iOS file.

Recommended reading: A beginner developer's review of 2015